Solution (source code)

= Solution

If $L$ has degree $n=r_1+2r_2$ and discriminant $d_L$, then every class in the <ideal class group> contains a nonzero integral ideal $\mathfrak a$ satisfying the <Minkowski bound for ideal classes>
$$
\boxed{N\mathfrak a\leq
\left(\frac4\pi\right)^{r_2}
\frac{n!}{n^n}\sqrt{|d_L|}.}
$$